SECONDARY CONTACTS
BREAKER
(Aux. Switch Contacts)
“a” Contact Open
When Breaker is Open
“b” Contact Open
When Breaker is Closed
MOT - Spring Charging Motor
LS - Limit Switch (Motor Cut-Off Switch)
SRD - Spring Release Device
STA - Shunt Trip Attachment
Y - Anti-Pump Relay
UVTA - Undervoltage Trip Attachment (Optional)
BOTTOM LEFT ROW,
When Viewed From Front of Breaker
(LS Contacts)
N.C. Contacts Open
When Closing Springs are
Fully Charged
N.O. Contacts Close
When Springs are
Fully Charged
AUXILIARY
SWITCH
Figure 4-9 Basic Schematic and Connection Diagrams for Power Operated Breaker
Effective July 2010
Instructional Book IB694C694-03
38
EATON CORPORATION www.eaton.com
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